package com.myutils;

import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.DOMException;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class WeatherUtil {
	private static String SERVICES_HOST = "www.webxml.com.cn";
	private static String WEATHER_SERVICES_URL = "http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx/";
	private static String PROVINCE_CODE_URL = WEATHER_SERVICES_URL
			+ "getRegionProvince";
	private static String CITY_CODE_URL = WEATHER_SERVICES_URL
			+ "getSupportCityString?theRegionCode=";
	private static String WEATHER_QUERY_URL = WEATHER_SERVICES_URL
			+ "getWeather?theUserID=&theCityCode=";

	private WeatherUtil() {
	}

	public static void main(String[] args) throws Exception {
		int provinceCode = getProvinceCode("辽宁"); // 3119
		int cityCode = getCityCode(provinceCode, "大连"); // 974
		List<String> weatherList = getWeather(cityCode);
		for (String weather : weatherList) {
			System.out.println(weather);
		}
	}

	public static int getProvinceCode(String provinceName) {
		Document document;
		DocumentBuilderFactory documentBF = DocumentBuilderFactory
				.newInstance();
		documentBF.setNamespaceAware(true);
		int provinceCode = 0;
		try {
			DocumentBuilder documentB = documentBF.newDocumentBuilder();
			InputStream inputStream = getSoapInputStream(PROVINCE_CODE_URL); // 具体webService相关
			document = documentB.parse(inputStream);
			NodeList nodeList = document.getElementsByTagName("string"); // 具体webService相关
			int len = nodeList.getLength();
			for (int i = 0; i < len; i++) {
				Node n = nodeList.item(i);
				String result = n.getFirstChild().getNodeValue();
				String[] address = result.split(",");
				String pName = address[0];
				String pCode = address[1];
				if (pName.equalsIgnoreCase(provinceName)) {
					provinceCode = Integer.parseInt(pCode);
				}
			}
			inputStream.close();
		} catch (DOMException e) {
			e.printStackTrace();
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		} catch (SAXException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return provinceCode;
	}

	public static int getCityCode(int provinceCode, String cityName) {
		Document doc;
		DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
		dbf.setNamespaceAware(true);
		int cityCode = 0;
		try {
			DocumentBuilder db = dbf.newDocumentBuilder();
			InputStream is = getSoapInputStream(CITY_CODE_URL + provinceCode); // 具体webService相关
			doc = db.parse(is);
			NodeList nl = doc.getElementsByTagName("string"); // 具体webService相关
			int len = nl.getLength();
			for (int i = 0; i < len; i++) {
				Node n = nl.item(i);
				String result = n.getFirstChild().getNodeValue();
				String[] address = result.split(",");
				String cName = address[0];
				String cCode = address[1];
				if (cName.equalsIgnoreCase(cityName)) {
					cityCode = Integer.parseInt(cCode);
				}
			}
			is.close();
		} catch (DOMException e) {
			e.printStackTrace();
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		} catch (SAXException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return cityCode;
	}

	public static InputStream getSoapInputStream(String url) {
		InputStream inputStream = null;
		try {
			URL urlObj = new URL(url);
			URLConnection urlConn = urlObj.openConnection();
			urlConn.setRequestProperty("Host", SERVICES_HOST); // 具体webService相关
			urlConn.connect();
			inputStream = urlConn.getInputStream();
		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return inputStream;
	}

	public static List<String> getWeather(int cityCode) {
		List<String> weatherList = new ArrayList<String>();
		Document document;
		DocumentBuilderFactory documentBF = DocumentBuilderFactory
				.newInstance();
		documentBF.setNamespaceAware(true);
		try {
			DocumentBuilder documentB = documentBF.newDocumentBuilder();
			InputStream inputStream = getSoapInputStream(WEATHER_QUERY_URL
					+ cityCode);
			document = documentB.parse(inputStream);
			NodeList nl = document.getElementsByTagName("string");
			int len = nl.getLength();
			for (int i = 0; i < len; i++) {
				Node n = nl.item(i);
				String weather = n.getFirstChild().getNodeValue();
				weatherList.add(weather);
			}
			inputStream.close();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (DOMException e) {
			e.printStackTrace();
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		} catch (SAXException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return weatherList;
	}
}
